Grinding, Drying & Transport 3

Accommodating Process Dynamics Depending on the material being ground or pulverized, maintaining the through-flow of the ground product to its destination is important. Depending on the particular process, it may be of benefit to either maintain a constant flow of the product through the transport lines or you may need to dynamically change the amount Read more…

Grinding, Drying & Transport 2

Analysis of the flow measurement As we noted in the Phase 1 of this series we need to maintain at least minimum air flows throughout the piping and grinding process to prevent dropout of particles in the transport piping or within the grinder/pulverizer. We must check the sensitivity of the measurement. Typically the flow measurement Read more…

Grinding, Drying & Transport 1

Designing Controls In this project we will be designing controls associated with equipment designed to take a coarse product, grind, pulverize and classify the material to the proper consistency (like that of face powder), dry it and then transport the material to a receiving process. If the material being processed is combustible, the control of Read more…

Hot Water Project: Phase 4

As we noted in the last hot water project blog, the customer noted that the steam pressure varied and the steam control valve position did not necessarily represent the steam flow to the heater. Let’s get the steam under control. We tell the customer that the addition of instrumentation to the steam lines will cost Read more…

Why We Need to Know the Basics

As you may have noticed, my blog posts are often triggered by questions and real life situations.  That is the case with today’s post. Some manufacturer’s web sites are VERY difficult to navigate.  Due to this fact, I will sometimes ask for sales or technical assistance instead of wasting too much time searching a vendor web site Read more…

Safety Barriers and Thermocouples

Why do I need safety barriers when I’m using thermocouples? It meets the definition of a simple apparatus.  I think the barrier sales people are simply looking for more sales! When I was asked this question, I thought I could use this example to provide some insight into the requirements of intrinsic safety systems. An Read more…

Rick Gonzalez

The late Rick Gonzalez joined Excel Engineering in 2003 with over 20 years’ experience in electric power system planning and analysis before his passing in 2012. In his previous positions at Northern States Power/Xcel Energy (Minneapolis, MN) and the Western Area Power Administration (Golden, CO), Rick performed short and long-range planning studies for local and regional Read more…

Mark Mathews

Senior Specialist in the Controls and Instrumentation Mark Mathews joined Excel in 2011 as a Senior Specialist in the Controls & Instrumentation discipline.  He has 23 years of experience in providing control system solutions to 3M and a broad array of other clients.  In that time, he has developed project execution skills that begin with Read more…

Intrinsic Safety Standards Update

ISA S12.2 subcommittee meeting report Spring, 2012 The work of harmonizing the Hazardous Area national standards of the United States with those of the international community continue in earnest. The ultimate goal of this harmonization is that products produced and approved in the US can be exported and installed in other countries, and vice versa. Read more…

Knowledge Base

Knowledge Base from Excel Engineering Excel Engineering continues to strive to bring the highest value to our clients through the excellent people that are part of our organization. We have several technical experts who want to share their knowledge. Please view the controls and intrinsic safety Excel Engineering blog categories for more information in these Read more…